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Feedback by supermassive black holes in galaxy evolution: Impacts of accretion and outflows on the star formation rate

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posted on 2023-05-20, 09:49 authored by Raouf, M, Silk, J, Stanislav ShabalaStanislav Shabala, Mamon, GA, Croton, DJ, Khosroshahi, HG, Beckmann, RS
We describe a physical model of the outflows produced as a result of gas accretion on to a black hole, and the resultant changes to star formation rates and efficiencies in galaxies, using the RADIO-SAGE semi-analytic galaxy formation model. We show that the ratio of outflow rate to SFR of galaxies is mainly driven by black hole mass and virial halo mass, and show that the SFR is higher than the outflow rate at low black hole masses. The model consistently reproduces the observed evolution of star formation rate density from 𝓏 = 6 to 𝓏 = 0, as well as the trend of the stellar mass - halo mass relations. We show the characteristic growth of massive galaxies influenced by AGN feedback at different redshifts. We find feedback to be prevalent in the most massive galaxy haloes, inhibiting the cooling catastrophe.

History

Publication title

Monthly Notices of the Royal Astronomical Society

Volume

486

Pagination

1509-1522

ISSN

0035-8711

Department/School

School of Natural Sciences

Publisher

Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2019 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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